Shift Registers in Digital Electronics
A register that provides the ability to shift its contents is called a shift register. In this video I have described the working of a four-bit shift register that is used to shift its contents one bit position to the right. The data bits are loaded into the shift register in a serial fashion using
the In input. The contents of each flip-flop are transferred to the next flip-flop at each
positive edge of the clock. To implement a shift register, it is necessary to use either edge-triggered or master-slave flip-flops. The level-sensitive gated latches are not suitable, because a change in the value of In would propagate through more than one latch during the time when the clock is equal to 1.
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